Impact of eco-extractives methods on the extraction of polyphenols and antioxidant and antimicrobial activities from Dialium waste wood and barks

Species of the genus Dialium, in the subfamily Dialoideae, are known to have high medicinal and nutritional value. This study examines the potential health benefits of waste products obtained by eco-extraction methods from the wood and bark of Dialium species from the Congo Basin. The focus is on the identification and quantification of polyphenols and the assessment of their antioxidant and antimicrobial effects. The results showed significant levels of catechin, epicatechin and salicylic acid using high-performance liquid chromatography (HPLC UV-Vis) analytical techniques. The antioxidant potential of the extracts obtained is assessed by tests targeting their ability to scavenge free radicals (DPPH) and reduce ferric oxide (FRAP), thereby inhibiting oxidative damage. This information provides an insight into the potential health benefits of eco-extracted waste. A correlative study looked at which polyphenols were likely to have certain antioxidant and antimicrobial activities.

Ultimately, Dialium corbisieri and Dialium bambidense by-products from wood processing industries in the Congo Basin countries can be considered as interesting materials for the extraction and recovery of natural polyphenols, particularly thanks to the high salicylic acid content present in the wood.